[INFO] updating cached repository https://github.com/three-star-flex-book/bitdefender-rust-error-example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a734b5973eb81a68e1c0e8fbab07b8e98e32efe2
[INFO] testing three-star-flex-book/bitdefender-rust-error-example against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthree-star-flex-book%2Fbitdefender-rust-error-example" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/three-star-flex-book/bitdefender-rust-error-example on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/three-star-flex-book/bitdefender-rust-error-example
[INFO] finished tweaking git repo https://github.com/three-star-flex-book/bitdefender-rust-error-example
[INFO] tweaked toml for git repo https://github.com/three-star-flex-book/bitdefender-rust-error-example written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/three-star-flex-book/bitdefender-rust-error-example already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5e1d7cd14491b2455072b3ba6f179242715e6539cd7af422de8d4eb46dabb9a5
[INFO] running `"docker" "start" "-a" "5e1d7cd14491b2455072b3ba6f179242715e6539cd7af422de8d4eb46dabb9a5"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling syn v1.0.14
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[INFO] [stderr]    Compiling multipart v0.16.1
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[INFO] [stderr]    Compiling serde_json v1.0.47
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[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling tokio v0.2.11
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling pin-project v0.4.8
[INFO] [stderr]    Compiling futures-util v0.3.4
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[INFO] [stderr]    Compiling futures-executor v0.3.4
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[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling redis v0.15.1
[INFO] [stderr]    Compiling hyper v0.13.2
[INFO] [stderr]    Compiling warp v0.2.1
[INFO] [stderr]    Compiling warp-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(async_await)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `future`
[INFO] [stderr]  --> src/main.rs:3:21
[INFO] [stderr]   |
[INFO] [stderr] 3 | use futures::{join, future};
[INFO] [stderr]   |                     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:21:12
[INFO] [stderr]    |
[INFO] [stderr] 21 |     return wait_both;
[INFO] [stderr]    |            ^^^^^^^^^ expected `()`, found tuple
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected unit type `()`
[INFO] [stderr]                   found tuple `(std::result::Result<redis::aio::Connection, redis::types::RedisError>, ())`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let (a, b) = start().await;
[INFO] [stderr]    |         ^^^^^^   ------------- this expression has type `()`
[INFO] [stderr]    |         |
[INFO] [stderr]    |         expected `()`, found tuple
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected unit type `()`
[INFO] [stderr]                   found tuple `(_, _)`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `warp-example`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5e1d7cd14491b2455072b3ba6f179242715e6539cd7af422de8d4eb46dabb9a5"`
[INFO] running `"docker" "rm" "-f" "5e1d7cd14491b2455072b3ba6f179242715e6539cd7af422de8d4eb46dabb9a5"`
[INFO] [stdout] 5e1d7cd14491b2455072b3ba6f179242715e6539cd7af422de8d4eb46dabb9a5